Portable station for wireless telegraphy.



G. VON ARGO. PORTABLE STATION FOR WIRELESS TELEGRAPHY. APPLICATION FILED OOT. 31,1907.

Patented May 17, 1910.

ceases.

G EORG VON ARGO, OF BERLIN, GERMANY.

PORTABLE STATION FOR WIRELESS TELEGRAPH.

Specification of Letters Patent.

Patented May 1157, 19110.

Application filed October 31, 1907. Serial No. 400,095.

exact description, reference being had to the accompanying drawing, forming a part of this specification.

This invention relates to portable stations for wireless telegraphy, which are characterized by the aerial conductor and also the masts serving for carrying the same being com osed of several sections adapted to be readily put together and taken apart and which, in a collapsed condition, are

easily portable.

The invention consists more particularly in a system of aerial conductors arranged like an umbrella carried by a mast composed of separately collapsible parts. The mast is insulated from earth andas a counter capacity a surface capacity formed of wires is preferably employed. The apparatus for wireless telegraphy is connected in between the aerial conductor system and the counter capacity. The use of an umbrella antennae system which, as is well known, has

a very high capacity, has'the advantage of requiring only one mast for its support, which mast in consequence of the symmetrical arrangement of the umbrella antennae may be made comparatively thin and light, as it is only subjected to pressure. From this-will be readily seen the practical importance of the result, which the use of an umbrella antennae in its combination with an easily dismountable or collapsible mast composed of separate parts affords in its use for portable stations.

A form of construction of the invention is shown in the accompanying drawing, in which:

Figure 1 is a side elevation of. my improved station, and Fig. 2 is a detail plan view of the connection of the counter capacity with the mast.

a is a mast composed of several sections. The separate sect-ions consist preferably of steel or magnalium, and are held together by means of short sleeves a. The mast is insulated from earth by an insulating support, for instance a block of marble b, or 1n other manner, and has at its upper end the umbrella antennae formed of wires 0.

The separate wires 0 extend from the top of the mast radially obliquely downward and are stretched toward the ground by cords d with which they are connected. For the sake of simplicity the umbrella antennae also serve for erecting the mast and maintaining it erect. In order to insure the position of the mast stay cords f may also be employed. In the present case, instead of the earth serving as counter capacity, a surface capacity which is formed of several wires 9 distributed around the mast and radially arranged relative thereto, is employed. These radial wires are well insulated from earth and run parallel thereto; they are disposed around the mast and attached to a central ring a which is connected with the mast through insulators such as shown in Fig. 2. Thus the radial wires are connected with each other. 7

The apparatus r, s, for wireless telegraphy, which may be of any known type, is connected, also in well known manner, between the aerial conductor system and the counter capacity g, above mentioned, in well known manner. I have diagrammatically illustrated such an apparatus in its general form, wherein 8 represents the sending circuit and r the receiving circuit. Both circuits may be alternatel thrown into circuit with the antennae an counter capacity by means of a switch 2'. All these features, however, do not form part of my invention but are merely represented so as to indicate how my invention may be operated in practice.

The arrangement of a counter-capacity insulated from the earth has as is well known the advantage of rendering it independentof a more or less ood earth connection, and consequently o the variation in the damping of the aerial conductor system thereby caused. It is essential particularly for portable stations which are to be rapidly erected at any suitable place and thenrapidly brought into a condition for operation to be independent of the earth and its resistance, so that always a uniformdamping of the oscillation system can be counted upon.

Having explained my invention, what I do claim and desire to secure by Letters Patent is:

1. A portable station for wireless telegraphy consisting of a metal mast composed of several easily dismountable sections and insulated from the ground, an umbrellashaped aerial stretched between said mast and several distant points on the ground but insulated from the latter, a counter capacity formed of wires disposed radially around the mast and insulated therefrom and from the ground, and the apparatus for wireless telegraphy interposed between the aerial and the counter capacity.

2. A portable station for wireless tele raphy consisting of a metal mast compose of several easily dismountable sections, and insulated from the ground, an umbrellasha ed aerial stretched between said mast an several distant points on the ground but insulated from the latter, a counter capacity comprising a conductivity ring surrounding eeaaoe said mast, insulators fastened to said ring and to said mast holding said ring c0ncen trically with the mast and Wires attached to said ring and radiating therefrom and fas- A tened at their free ends to the ground but insulated therefrom, the a paratus for wireless telegraphy interpose between the aerial and said counter capacity.

In witness whereof, I hereunto subscribe my name this 16th day of October A. D. 1907.

GEORG VON ARGO.

Witnesses HENRY HAsPER, WOLDEMAR HAUPT, 

